01-07 Installing the Power Cables and Equipotential Cabl (1)

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7 Installing the Power Cables andEquipotential Cables of the BTS3012

About This Chapter

This task describes how to install the power cables and equipotential cables of the BTS3012.

7.1 Installing the BTS3012 Power Cables

The BTS3012 power cables are used to lead the external power into the BTS3012.

7.2 Installing the BTS3012 PGND Cables

This task describes how to install the BTS3012 PGND cables. The BTS3012 PGND cables are

used to ground the BTS3012. Therefore, the BTS3012 can run safely.

7.3 Installing the BTS3012 Equipotential Cables

This task describes how to install the BTS3012 equipotential cables. The cables are used to

connect the grounding terminals between the cabinets so that the potential at all the cabinets is

equal and the BTS3012 runs safely.

BTS3012

Installation Guide

7 Installing the Power Cables and Equipotential Cables of the

BTS3012

Issue 02 (2007-07-25) Huawei Technologies Proprietary 7-1


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7.1 Installing the BTS3012 Power Cables

The BTS3012 power cables are used to lead the external power into the BTS3012.

Procedure

Step 1 Route the power cable by referring to 9.2 Cabling Specifications for the BTS.

Step 2 Make OT terminals at both ends of the power cable by referring to Installing the OTTerminal.

Step 3 Remove the protection cover from the EMI filter and power input wiring terminal block, asshown in Figure 7-1.

Figure 7-1 Removing the protection cover

Step 4 Lead the cord end terminal of the power cable through the wiring terminal block.

Step 5 Use a straight screwdriver to loosen the screws in the small round hole on the upper left of thepower input wiring terminal block.

Step 6 Insert the two wires on the cord end terminal of the power cable into the ports labeled -48V andGND respectively on the left of the wiring terminal block.


BTS3012

BTS3012

Installation Guide

7-2 Huawei Technologies Proprietary Issue 02 (2007-07-25)
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NOTE

Insert the cord end terminal of the 48 V power cable into the port labeled 48V and insert the cord end

terminal of the GND cable into the port labeled GND. As shown in Figure 7-2, the dashed lines indicate

the cables that are assembled before delivery.

Figure 7-2 Installing the power cable

GND

-48V

-48V

GND

GND

-48V

-48V

V-

V+

GND

GND

-48V

P4

P4 P1

P2

P5

P5 P2

P1

P3

P3

PGND cable

-48 V power cable

GND cable

Step 7 Use a straight screwdriver to tighten the screws on the upper side of the wiring hole.

Step 8 Reinstall the power protection cover.

Step 9 Route the power cable to the power distribution frame along the cable rack.

Step 10 Connect the OT terminals of the power cables to the corresponding wiring posts on the powerdistribution frame (PDF), as shown in Figure 7-3.

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Installation Guide


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Figure 7-3 Securing the power cable

2

3

5

4

1

(1) Wiring bolt (2) Flat washer (3) Spring washer (4) Nut (5) OT terminal

NOTE

Adhere to the following principles when connecting the OT terminals of multiple power cables to onewiring post on the PDF:

l Do not stack one OT terminal on another. Instead, perform cross or back-to-back installation.

l If the OT terminals must be stacked, bend them at an angle of 45 or 90. Place the bigger OT terminals

under the smaller ones.

l Connect at most three OT terminals to one wiring post.

Figure 7-4 shows three examples. Installation of all the OT terminals is subject to the previously mentioned

principles.


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Figure 7-4 Installing OT terminals of multiple cables

Bent at an angle of

45or 90Back-to-back installation

Cross installation

1

2

3

1

2

3

1

2

3

(1) Flat washer (2) Nut (3) Spring washer

Step 11 Attach labels to the power cable by referring to Labeling Power Cables.

----End

Example

Figure 7-5 shows the installed BTS3012 power cables.

BTS3012

Installation Guide


BTS3012

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Figure 7-5 Installing the power cable

-48V external input cable

GND external input cable

7.2 Installing the BTS3012 PGND Cables

This task describes how to install the BTS3012 PGND cables. The BTS3012 PGND cables are

used to ground the BTS3012. Therefore, the BTS3012 can run safely.

Procedure

Step 1 Route the PGND cable by referring to 9.2 Cabling Specifications for the BTS.

Step 2 Make OT terminals at both ends of the PGND cable by referring to Installing the OTTerminal.

Step 3 Connect one end of the PGND cable (green and yellow cable) to the PGND wiring post on theprotection grounding bar on top of the BTS3012 cabinet, as shown in Figure 7-6.


BTS3012

BTS3012

Installation Guide

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Figure 7-6 Installing the PGND cable

GND

-48V

-48V

GND

GND

-48V

-48V

V-

V+

GND

GND

-48V

P4

P4 P1

P2

P5

P5 P2

P1

P3

P3

PGND cable

-48 V power cable

GND cable

Step 4 Route the PGND cable to the indoor grounding bar along the indoor cable rack.

Step 5 Connect the other end of the PGND cable to the terminal of the indoor grounding bar.

----End

7.3 Installing the BTS3012 Equipotential Cables

This task describes how to install the BTS3012 equipotential cables. The cables are used to

connect the grounding terminals between the cabinets so that the potential at all the cabinets isequal and the BTS3012 runs safely.

Context

The BTS3012 equipotential cable is a green and yellow cable with a cross-sectional area of 25

mm2. If you prepare the cable, it should be a green and yellow cable with a plastic insulation

copper core and with a cross-sectional area of at least 25 mm2.

CAUTION

The equipotential cable is required for combined cabinets or a cabinet group.

Procedure

Step 1 Cut the cable to an appropriate length based on the actual routing path of the equipotential cable.

Step 2 Attach temporary labels to both ends of the cable. The contents of the temporary labels shouldbe consistent with the contents of the formal labels or can be determined based on your

requirements.

Step 3 Route the equipotential cable according to the specification requirements for cabling and thecabling mode required for the project.

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Installation Guide


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NOTE

Route the equipotential cable on the cable rack and tie it with the power cables and grounding cables.

Step 4 Make OT terminals at both ends of the equipotential cable by referring to Installing the OTTerminal.

Step 5 Connect one end of the cable to the protection grounding bar on the top of the main cabinet, asshown in Figure 7-7, and then use the spring washer and screws to fix the OT terminals.

Step 6 Repeat Step 5 to connect the other end of the cable to the protection grounding bar on the topof the extension cabinet.

Figure 7-7 Connecting the equipotential cables for the combined cabinets

Power cables

Equipotential Cables for the Combined Cabinet

GND

-48V

-48V

GND

GND

-48V

-48V

V-

V+

GND

GND

-48V

GND

-48V

-48V

GND

GND

-48V

-48V

V-

V+

GND

GND

-48V

Step 7 Install the protection cover for the power cable on the top of the cabinet.

----End


BTS3012

BTS3012

Installation Guide

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01-07 Installing the Power Cables and Equipotential Cabl (1)

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